US2229965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic press circuit
Assignee: Hydraulic Development Corp Inc
•
Filing: 1938-08-16
•
Granted: 1941-01-28
•
Expires: 1958-08-16
Abstract
No abstract record available.
Inventors
- 👤 Ernst Walter
- 👤 Johan A Muller
- 👤 Victor S Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-01-28 | 1944-07-29 | 1945-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-28 | 1948-07-29 | 1949-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-28 | 1952-07-29 | 1953-01-28 | $7700.00 | Window Closed / Lapsed |